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BO Pegasi: A candidate on the breaking stage of the TRO cycle
Qian SB(钱声帮)1,2,3; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMY & ASTROPHYSICS
2002-06
卷号387期号:3页码:903-906
DOI10.1051/0004-6361:20020167
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收录类别SCI ; EI
关键词Stars : Binaries : Close Stars : Individuals : Bo Peg Stars : Evolution
摘要A detailed period study of the short-period (P = 0.(d)58) close binary system, BO Peg, is presented based on the analysis of its O-C curve. It is found that the orbital period shows a continuous decrease with a rate dP/dt = -1.26 x 10(-7) days/year while it undergoes a possible small-amplitude oscillation. If the period oscillation is cyclic, it can be explained either by the light-time effect via the presence of an unseen third body or by the magnetic activity cycle of the secondary component. The continuous period decrease suggests a secular mass transfer from the more massive to the less massive component, which is in agreement with the near-contact configuration with a lobe-filling primary (Yamasaki & Okazaki 1986). These observations, as seen in RT Scl, FT Lup, TT Her, RS Ind, and V388 Cyg, are consistent with the Thermal Relaxation Oscillation (TRO) theory in that the primary component is transferring mass to the secondary in the broken-contact phase. To satisfy such a decrease in the orbital period, a conservative mass transfer rate (with no magnetic effect) would be of the order of dM/dt = 1.53 x 10(-7) M./year.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
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归档日期2002-06-26
WOS记录号WOS:000175901300012
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ORBITAL PERIOD MODULATION ; URSAE MAJORIS SYSTEMS ; CLOSE BINARIES ; CONTACT
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5758
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, PR China
2.National Astronomical Observatories, Chinese Academy of Science (NAOCAS)
3.United Laboratory of Optical Astronomy, Chinese Academy of Science (ULOAC)
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Qian SB,Qian, SB . BO Pegasi: A candidate on the breaking stage of the TRO cycle[J]. ASTRONOMY & ASTROPHYSICS,2002,387(3):903-906.
APA Qian SB,&Qian, SB .(2002).BO Pegasi: A candidate on the breaking stage of the TRO cycle.ASTRONOMY & ASTROPHYSICS,387(3),903-906.
MLA Qian SB,et al."BO Pegasi: A candidate on the breaking stage of the TRO cycle".ASTRONOMY & ASTROPHYSICS 387.3(2002):903-906.
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